general knowledge Q&A

Question 1

what is the equation for speed?

Answer 1

distance/time

Question 2

what is the unit for speed?

Answer 2

m/s

Question 3

is speed a vector quantity?

Answer 3

yes

Question 4

does an electron have a positive or negative charge?

Answer 4

Negative charge

Question 5

Give 2 things that will impact the drivers thinking distance:

Answer 5

1. Drugs
2. alcohol

Question 6

Give 2 things that will impact the drivers breaking distance:

Answer 6

1. Bad condition of tires
2. A slope/bump on the road

Question 7

what is the equation for acceleration?

Answer 7

acceleration= change in velocity/Change in time

Question 8

On a velocity time graph where can you find the distance travelled?

Answer 8

Area under the graph for the time interval

Question 9

what is a vector quantity?

Answer 9

an object that has both magnitude and direction

Question 10

How many forces normally act on an object?

Answer 10

2 or more

Question 11

what is the equation linking mass and weight?

Answer 11

w=mg

Question 12

what can be said about the forces on an object moving at a constant velocity?

Answer 12

The object has 0 acceleration

Question 13

what decides the kinetic energy particles?

Answer 13

Temperature

Question 14

What do the parachutist desiderate when they deploy their parachute?

Answer 14

the resultant force will no longer be 0. the air resistance becomes greater than the weight.

Question 15

which nuclear radiation is least penetrating?

Answer 15

Alpha

Question 16

What does Newton’s 2nd law state?

Answer 16

if there is a resultant force on an object, that object will accelerate
(f=ma)

Question 17

What is inertia?

Answer 17

the natural tendency of an object to resist changes in their velocity.

Question 18

What is the relationship between acceleration and velocity?

Answer 18

acceleration=change in velocity/Change in time

Question 19

What is inertial mass?

Answer 19

A measure of how difficult it is to change the velocity of an object

Question 20

equation for resultant force:

Answer 20

RF=ma

Question 21

State Newton’s 3rd law:

Answer 21

whenever two objects interact, the forces they exert on each other is equal & opposite.
(Friction & reaction and equal & opposite)

Question 22

Why does a bouncing ball eventually stop bouncing?

Answer 22

Energy is dissipated into the surroundings by heating

Question 23

What are the action & reaction forces for an object floating on water?

Answer 23

weight is the action force
upthrust is the reaction force

Question 24

What is the equation for ohm’s law?

Answer 24

V=IR

Question 25

What is momentum?

Answer 25

An measure of the amount of movement of an object

Question 26

What is the units for mass?

Answer 26

Kg

Question 27

what is the units for velocity?

Answer 27

m/s

Question 28

equation for momentum:

Answer 28

P= m v

Question 29

units of momentum;

Answer 29

kg m/s

Question 30

units for acceleration:

Answer 30

meter per second squared

Question 31

what charge is a proton?

Answer 31

positive

Question 32

State newton's first law:

Answer 32

If the resultant for on an object is 0 the object will remain stationary

Question 33

How do you calculate extension?

Answer 33

extension= length - original length

Question 34

what is weight?

Answer 34

Force of gravity acting on an object

Question 35

how many forces act to stretch a spring?

Answer 35

two

Question 36

How do you calculate stopping distance?

Answer 36

stopping distance= thinking distance + breaking distance

Question 37

What does the gradient of an extension-force graph represent?

Answer 37

Spring constant

Question 38

what type of deformation is for a spring that has exceeded its elastic limit?

Answer 38

Inelastic deformation

Question 39

What is the elastic limit of an elastic object?

Answer 39

The force at which the force is applied to the elastic object stops being directly proportional to the extension.

Question 40

what is Hooke's law? (equation)

Answer 40

Force= spring constant x extension f=k e